Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c8dfcc7fc504321…

MALICIOUS

PDF

92.1 KB Created: 2021-06-28 11:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fe9c3f56126a8e85cbae67ab2e58fcaf SHA-1: 3df5b8442dbbfee708b7eec2b10f37d0f01b90c4 SHA-256: 4c8dfcc7fc504321edf628dab995657ded1345638bff0203464e271137d47194
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a cloud document impersonation lure, attempting to trick users into clicking links that lead to compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the nature of the links and the impersonation suggest a multi-stage attack where the PDF serves as an initial lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://indobaliart.com/sitefiles/file/60955766156.pdf In PDF document text
    • https://aldurra.ly/images-editeur/img/file/kaweb.pdfIn PDF document text
    • https://securitydm.com/slicice/file/89496611276.pdfIn PDF document text
    • http://splogservice.ru/content/file/82823641178.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c494e838bd---73483638580.pdfIn PDF document text
    • http://kino-cosmic.ru/sadm_files/rugulidiri.pdfIn PDF document text
    • http://palaciodelosnavas.com/userfiles/file/6346807569.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c99a0ac4f2---noruva.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4995e7703---52233576960.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/dawavonakumuxotepebozozef.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/kulex.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/o3v8ks1rkqnb0pu5pfsfn6sn71/wefusawaz.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6b5691617---44659546524.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c35643ccef---70918416588.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1812c6619---wibinize.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aebdf3a0ede---belamikuwukepelotek.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16078bad879b6c---41310828835.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867dfd8ffd0---35017376075.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b411cf1673---wutajovaramafagegagagiwa.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/pakis.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/85777458231.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/30869501478.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/1norevg4q28g0vvvvi19uj7bfs/givezifixutoxelibigopo.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/k8ualunah5plsp5tu7o39u3ps7/lovegerapubevodomalanapi.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f9c647515---27611474919.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/l6hopni5d9ojckmt8phh4grtp5/tekori.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=excel+data+matching+between+worksheetsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001025e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A75 11220 bytes
SHA-256: 4fdfb694e2a3fa402e1d5257d13ed04ca431a220ee3787e5f7e1d60c8c9b234c
font_02_sfnt_off00013462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13462 17664 bytes
SHA-256: b176483ee0ec4cdac46024f04b794fa72b11e26d6f2611a5a18af0d07413bc9e

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